Measuring-scale.



.No. 7|4,|72. Patented Nov. 25', 1902., H. GILES.

MEASURING SC'ALE. I (Application file d mm. 27, 1902. (No Model.)

l v 45) WITNESSES: 7/ INVENTOR' .v A I. I il 1 ATTORNEY lhuTED STATESPATENT HARVEY GILES, OF SOUTH BOUNDBROOK, NEW JERSEY.

MEASURING-SCALE.

SPECIFICATION forming part of Letters Patent No. 714,172, dated November25, 1902.

Application filed January 27, 1902. Serial No. 91,304. (No model.)

To all whom, it may concern:

Be it known that I, HARVEY GILES, a citizen of the United States, and aresident of South Boundbrook, in the county of Somerset and State of NewJersey,have invented certain new and useful Improvements inMeasuring-Scales, of which the following is a specification.

The invention relates to improvements in measuring-scales; and itconsists more especially in a novel attachment connected with the scalefor enabling the accurate measuring on a true radial line from thecenter of a hole which may be formed in a piece of metal or othermaterial to a distant point. The difficulties found by mechanics whilelaying out their work in accurately measuring from the center of a holeto a distant point are well understood, and the purpose of the presentinvention is to enable this measuring to be done quickly and accurately.

The inventionwill be fully understood from the detailed descriptionhereinafter presented, reference being had to the accompanying drawings,in which Figure 1 is a top View of the measuringscale and attachmentconstructed in accordance with and embodying the invention, the saidscale and attachment being illustrated upon a piece of metal from thecenter of the holes in which it may be desired to measure to distantpoints whereat other holes are to be formed. Fig. 2 is a longitudinalsection of same on the dotted line 2 2 of Fig. 1, the scale and metalplate being partly broken away. Fig. 3 is an end View of same, takenfrom the left-hand end of Fig. 1,'the metal plate being partly brokenaway. Fig. at is a View corresponding with Fig. 2, but illustrating theapplication of the scale to a metal plate not having a flat uppersurface; and Fig. 5 is a bottom View, partly in section,of theattachment, a portion of the scale being indicated by dotted lines.

In the drawings, 10 designates the measuring-scale, 11 a metal plate,and 12 the attachment applied upon the end of the scale 10 andconstituting the essential part of the present invention. The scale 10is an ordinary metal scale, and upon one end thereof is applied theattachment 12, which comprises two main features, one being means forsecuring the atscale 10 and havingat another edge thedownwardly-extending flange 18 to engage the end of the scale 10, asshown in Fig. 3, the said flanges 17 and 18 being at right angles to oneanother, so as to securely engage and keep the frame 15 in proper alinedrelation with the end of the scale 10. The clamping-plate l6is in linewith the flange 17 of the frame 15, and it engages the edge of the scale10 directly opposite to that edge thereof which is engaged by the flange17. The clampingplate 16 carries horizontal and parallel pins 19, whichenter apertures 20 in the frame 15, said apertures 20 and said pins 19affording guides for the clamping-plate 16 and preserving said plate 16in parallel relation with the flange 17 of the frame 15. Theclamping-plate 16 may be moved toward or from the frame 15, and saidplate 16 is adapted to be clamped against the edge of the scale 10 bymeans of the screw 21, which passes freely through an aperture in theplate 16 and enters a threaded socket formed within the frame 15. Byturning the screw in one direction the plate 16 will be moved tightlyagainst the edge of the scale 10, and when the screw 21 is turned in anopposite direction the head of the screw will release. the plate 16, andthe attachment 12 may then be removed from the scale 10. The screw 21operates to bind the plate 16 and flange 17 against the opposite edgesof the scale 10 and in that way to hold the attachment 12 firmly uponthe end of said scale.

The conical pin 13 is connected with the lower end of a screw 22, whichis mounted within the vertically-arranged tubular casing 23 and engagesa threaded bore 24 thereof. The casing 12 will preferably be formedintegrally with the frame 15, by which it is supported, and the lowerend of the casing 12 will by preference be equipped with a chamber25,capable of receiving substantially the entire pin 13 when the latteris moved upward by the operation of the screw 22. The inner walls of thechamber operate as guides for the upper end 26 of the pin 13, said upperend 26 having plain vertical surfaces snugly filling the chamber 25 incrosssection. The upper end of the screw 22 is provided with a head 27for convenience in operating said screw. The purpose of the screw 22 isto enable the accurate vertical adjustment of the pin 13 in accordancewith the size of the hole 14 in the plate or work 11 said pin is towholly or in part enter.

The point or lower end of the pin 13 is in line with an operating edge28 of the scale 10, so that in the employment of the scale andattachment a line drawn along the edge 28 of the scale would be in linewith the pointed lower end of the pin 13 and in line with the center ofany hole 14 into which said pin 13 might be projected. The point of thepin 13 is also at a predetermined distance from the end of the scale 10,and this distance will be governed by the horizontal diameter of theupper end 26 of said pin 13, and the diameter of the upper end of thepin 13 will be governed somewhat by the size of the scale and itsattachment and the character of the work to which the invention may beapplied. It

- is desirable, however, that the workman shall know just how far thepoint of the pin 13 is from the end of the scale 10, so that he may beaccurate in his measurements from the center of a hole 14 to a distantpoint on the plate 11. If, for illustration, the point of the pin 13should be three-sixteenths of an inch distant from the end of'the scale10 and the workman is to measure a distance of five inches from thecenter of the hole 14, containing said pin, he would necessarily allowfor the said three-sixteenths of an inch, or, in other words, he wouldmeasure five inches from the center of the said hole 14, this under theconditions stated being represented on the scale 10 at the mark denotingfour and thirteen-sixteenths inches.

In the employment of the invention the attachment 12 is secured to theend of the scale 10 by means of the screw 21, clampingplate 16, andflanges 1718 in the manner above described, and the attachment and scaleare then ready for use. If it should be desired to measure from thecenter of a hole 14 to a distant point on the plate or work 11, thescale 10 would be placed upon the work 11 and the point of the screwwould be inserted into the hole 14, from which the measurement is totake place. In applying the scale and the attachment to the work 11 thepin 13 would be adjusted so that its circumferential surfaces at somepoint would snugly and fully engage and close the hole 14, which wouldmean that the center of the point 13 would be at the true center of thehole 14, with the scale 10 lying flat against the work or plate 11. Whenthe scale and attachment are in this condition and relation to the plateor work 11, the scale may be utilized for the purpose of drawing trueradial lines from the center of the hole 14, as denoted in Fig. 1, andalso for measuring to any predetermined points on the work 11 from thecenter of said hole 14. If, for instance, one hole 14 is in the plate orwork 11 and it is desired to form in said plate another hole atapredetermined distance from the center of said hole 14, the workman mayreadily find the proper location for the second hole by means of thescale and its attachment, the center of the pin 13 always donoting thecenter of the first holeand there always being a predetermined distancebetween the center of said pin and the adjacent edge of the scale 10.

When the pin 13 is made conical in form, as shown, it is adapted for usein connection with any of the varying sizes of holes from a very smallhole up to a hole equal in diameter to the diameter of the upper end 26of the pin 13, since by adjusting the said pin vertically it will enterinto engagement with the surfaces of the various sizes of holes, whileallowing the scale 10 to assume a true position upon the plate or work11. I illustrate in Fig. 1 the various sizes of holes to which a pin 13three-eighths of an inch in diameter at its upper end is adapted, theconical sides of the pin being adapted to engage the edges of theseveral holes owing to the capability of adjusting said pin by means ofthe screw 22. When a hole is found which snugly receives the upper end26 of the pin 13, this will be the largest hole that the pin 13 iscapable of use in connection with, since if the holes are larger thanthe upper end of the pin 13 there is grave danger that the pin will notassume a truly central position within the hole, and hence that theresulting admeasurements may be inaccurate.

The pin 13 is guided in its movements and kept in proper vertical-alinement by reason of the elongated bore 24, through which the screw22 passes, and by reason of the fact that the walls of the chamber 25are capable of snugly receiving and guiding the upper end of the pin 13.An occasion in which the present invention will be found to be of verygreat advantage is when, for instance, the upper surface of the plate orwork 11 is not truly horizontal and the hole 14, whose center is to bemeasured from, is on a lower plane than a higher level of the platewhere, for instance, a second hole is to be formed, as denoted in Fig.4. When the work is thus irregular on its surface, a mechanic has somedifficulty in accurately measuring from the center of the hole in a partof the work on one plane to a predetermined point for the center of ahole to be formed in a part of the work disposed on a higher plane; butwith the present invention this difficulty is removed, since the scale10 may lie fiat upon the higher plane of the work, where the second holeis to be formed, while the pin 13 is adjusted by means of the screw 22to find the center of the hole in that part of the work on the lowerplane, and thus it is rendered very easy to measure from the center ofthe hole on the lower plane to the proper predetermined distance on thehigher level of the work or plate.

The conical pin 13 and its casing 23 may vary in size as may be requiredfor the character of work to which the scale and its attachment is to beapplied-as, for illustration, the pin 13-and casing 23 may be of adiameter adapted to the size of holes from the center of which theadmeasurements are to be taken, or said pin 13 and casing 23 may beelongated vertically, as shown in Fig. 4:, so that said pin may properlyreach holes located in a part of the work below the plane at which itmay be desired to form other holes.

What I claim as my invention, and desire to secure by Letters Patent, is

1. An instrument for enabling the accurate measuring on a true radialline from the center of holes varying in diameter to distant points on apiece of work, the said instrument comprising the scale, in combinationwith the conical pin 13 connected therewith and set a definite distanceoff from the. end of the operating edge of the scale with its centralpoint in line with said edge, and means for adjusting said pin so thatits end may pass (1 own ward below the lower su rface of said scale andfit into holes Varying in diameter; substantially as and for thepurposes described.

2. The scale, in combination with the conical pin 13 connectedtherewith, the screw for vertically adjusting said pin to adapt it toholes varying in diameter, and the casing receiving said screw andadapted to receive and guide the upper end of said pin, said pin beingset a definite distance 0E from the end of the operating edge of thescale with its central point in line with said edge; substantially assetforth.

3. The scale, in combination with the attachment therefor, comprisingthe clamping-. frame adapted to engage the opposite edges of said scale,the conical pin 13 carried by said frame, and means for adjusting saidpin vertically so as to adapt it to holes varying in diameter, said pinbeing set a definite distance off from the end of the operating edge ofthe scale with its central point in line with said edge; substantiallyas set forth.

4. The scale, in combination with the attachment therefor, comprisingthe clampingframe adapted to engage the opposite edges of said scale,the tubular casing 12 carried by said frame, the screw mounted in saidcasing, and the conical pin 13 carried by said screw and adapted to beadjusted vertically within said casing to adapt the lower portion ofsaid pin to holes varying in diameter; substantially as set forth.

5. The scale, and the attachment therefor, comprising the frame 15having the flanges 17 and 18 to engage the end and side edges of saidscale, the clamping-plate 16 to engage the side edge of said scaleopposite to the flange 17, and the screw 21 for detachably fasteningsaid frame 15 and plate 16 to said scale, combined with the conical pin13 car-' ried at one corner of said frame 15, and means for adjustingsaid pin vertically to adapt it to holes varying in diameter, the centerof said pin being in line with the operating edge of said scale;substantially as set forth.

6. The scale, in combination with the conical pin connected therewithand having the vertical cylindrical head 26, and means for adjustingsaid pin vertically so as to adapt its conical portion to holes Varyingin diameter, and said head to enter a hole of its diameter, said pin atits central point being in line with the operating edge of said scale;substantially as set forth.

7. The scale,in combination with the conical pin 13, connected therewithand having the vertical cylindrical head 26, the screw for verticallyadjusting said pin to adapt it 'to the holes varying in diameter and tomove said head into a hole of its own diameter, and the casing receivingsaid screw and adapted to receive the upper portion of said pin, thecentral point of said pin being in line with an operating edgeof saidscale; substantially as set forth.

Signed at New York, in the county of New York and State of New York,this 25th day of January, A. D. 1902.

HARVEY GILES.

Witnesses:

CHAS. O. GILL, ARTHUR MARION.

ICC

